18899900 has 18 divisors (see below), whose sum is σ = 41013000. Its totient is φ = 7559920.

The previous prime is 18899899. The next prime is 18899917. The reversal of 18899900 is 999881.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 94400 + ... + 94599.

It is an arithmetic number, because the mean of its divisors is an integer number (2278500).

Almost surely, 2^18899900 is an apocalyptic number.

18899900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18899900 is an abundant number, since it is smaller than the sum of its proper divisors (22113100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18899900 is a wasteful number, since it uses less digits than its factorization.

18899900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189013 (or 189006 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 18899900 is about 4347.4015227490. The cubic root of 18899900 is about 266.3707307315.

The spelling of 18899900 in words is "eighteen million, eight hundred ninety-nine thousand, nine hundred".